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Edit File: gc_weakref.py
from weakref import ref class GcWeakrefs(object): # code copied and adapted from WeakKeyDictionary. def __init__(self, ffi): self.ffi = ffi self.data = data = {} def remove(k): destructor, cdata = data.pop(k) destructor(cdata) self.remove = remove def build(self, cdata, destructor): # make a new cdata of the same type as the original one new_cdata = self.ffi.cast(self.ffi._backend.typeof(cdata), cdata) self.data[ref(new_cdata, self.remove)] = destructor, cdata return new_cdata